Armor All Microfibre Glass Cloth is especially designed for use on interior and exterior car glass without causing any superficial scratching or swirling. The cloth is reusable and simply requires washing out and drying after the job is done. Did you know? Thousands of strands are contained within microfibre cloths, many more than your regular fabric. All these superior and tough extra fibres result in far more effective removal of film, smudges, fingerprints, dirt, road-grime and other minor contaminants from the glass to leave a smear-free, crystal-clear surface behind.